Vacuum cleaning-machine.



G. BRAND.

VACUUM CLEANING MACHINE.

APPLICATION FILED JULY 24. 914.

1, 145, 1 1 2. Patented July 6, 1915.

S mvemtoz 6607c fire/rad nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn c.

GEORGE BRAND, OF BROOKLYN, NEW YORK, ASSIGNOB TO THE BRAND lVIANUFAG-TUBING- CORPORATION, A CORPORATION NEW YORK.

VACUUM CLEANING-MACHINE.

Specification of Letters Patent.

Patented July 6, 1915.

Application filed July 24, 1914. Serial No. 852,887.

To all whom it may concern:

Be it known that I, GEORGE BRAND, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in Vacuum Cleaning- Machines, ofwhich the following is a specifica- I tion.

This invention relates to vacuum cleaning machines of the portable typehaving a suction creating bellows and a traction wheel for operating thebellows, and relates more particularly to an improved traction wheel andthe connection between the wheel and the bellows.

An object of this invention is to provide a yielding traction wheel anda yielding connection between the wheel and the bellows for absorbingthe shock incident to the conversion of the rotary into thereciprocating motion of the parts; for insuring the smooth and noiselessrunning of the machine and for reducing the jar upon the entire machineduring use to thus prolong the life of the machine and reduce the wearon the movable parts to a minimum.

In the present preferred embodiment of this invention, theabove-mentioned objects are accomplished by the provision of a resilienttraction wheel on the machine, and a resilient pitman connection betweenthe wheel and the movable leaf of the bellows. By combining theresilient wheel with the resilient pitman connection there is obtained acertain elasticity not only between the movable leaf of the bellows andthe traction wheel, but also between the axle of the machine upon whichthe wheel is mounted and the movable leaf of the bellows. This improvedstructure allows a free play of the parts of the machine without thenecessity of providing loose connections or supplemental springs for thebellows and the axle mountings.

The details of the invention will appear more specifically from thefollowing detail description of the present embodiment of the invention,the same being illustrated in the accompanying drawing wherein Figure 1is a side elevation of a conventional form of vacuum cleaning machinehaving the improvements applied thereto. Fig. 2 is a front elevation ofthe same. Fig. 3 is a detail, enlarged, side elevation of the forwardend of the machine and the im- Referring to this drawing, wherein likeparts are indicated by similar characters of reference throughout theseveral views, 10 designates the body of a vacuum cleaner of anyapproved type having a supportinghandle 11 adapted to be grasped in thehand to elevate the body 10 and bring a nozzle 12 at the forward end ofthe body into contact with the surface to be cleaned. The for.- ward endof the body is provided with a transverse axle 13 upon the opposite endsof which are mounted a pair of supporting wheels 14 provided with rubberor other form of friction treads 15.

The traction wheels 14 are preferably of the'resilient type and are madeup of a cast rim structure having inwardly extending lugs 16 at spacedintervals within the rim, and having a cast hub 17 having correspondingoutwardly extending lugs. Rings 18 of resilient material, such as pianowire, are passed through the opposed lugs of the rim and the hub toyieldingly connect the same. These rings 18 provide a resilient actionfor the wheel.

The body 10 is provided with a bellows of any suitable type, as isusual. and in the present illustration the machine is shown as havingtwo bellows 19 disposed at the opposite ends of the body and on topthereof. The movable leaves of the bellows are secured to a commonrocking plate 20 which has connection at its forward end with thetraction wheels, whereby to effect the rocking of the plate 20 and theconsequent operation of the bellows 19.

The connection between the plate of the bellows and the traction wheelsis shown in the present instance as of the pitman type, and isresilient. This connection comprises a bail 21, the middle portion ofwhich is hinged by a clip 22 to the forward end of the bellows plate 20.The opposite ends or arms of the bail 21 are turned down at right anglesto the middle portion of the bail and have pivotal connection at 23 toone of the lugs 16 of each traction wheel. It is thus noted that thebail is eccentrically pivoted upon the traction wheels, so that upon therotation of the wheels the bail is raised and lowered to thus rock theplate 20.

An important feature of this invention is to provide a resilientconnection between the ture of the invention is carried out by formingthe bail 21 of resilient, relatively thin wire possessing considerableelasticity, and which has its downwardly extending arms 24 curved so asto insure a spring action in the raising and lowering of the bail. InFig.1 this curving of the arms 24 is effected by bending the arms intosubstantially S- shape, while in Fig. 3 of the drawing the arms 24* areshown as bent into semi-circular form so as to providea single enlargedloop which is adapted to yield upon sudden impact or jar to thus absorball shock, and thereby prevent undue Wear upon the rocking and rotaryparts of the machine. "It is, of course, understood thatthe arms 24L maybe curved in any desired manner so as to provide for a resilientconnection between the wheel and the bellows. I

What I claim is 1. In a vacuum cleaning machine, the combinatlon wlth abody having a bellows thereon, of a pair of traction Wheels on saidbody, and a bail hinged at its middle portion to themovable leaf of thebellows having curved resilient arms depending therefrom, and havingeccentric pivotal connection with said traction wheels, whereby tooperate said bellows upon the movement of said body.

2. In combination with'the body of a vacuum cleaning machine and abellows thereon, of a pair of traction wheels supporting the body, and abail hinged at its middle portion to the movable'leaf of the bellows andhaving its opposite arms bent down at right angles to the middle portionand pivotally connected eccentrically to said traction wheels, saiddownwardly bentarms being curved whereby to provide a resilientconnection between the traction'wheels and the bellows.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses. 1 c r v GEORGE BRAND. Witnesses:

JosnPH J. MILLER, FRANCIS H. LEI-IMAN.

G'opies of this patent may be obtained for 'five cents each, byaddressing the Gon'imissioner of Patents,-

Washington, D. G.

